121021211001 has 8 divisors (see below), whose sum is σ = 164794840704. Its totient is φ = 78964194320.

The previous prime is 121021210979. The next prime is 121021211033. The reversal of 121021211001 is 100112120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121021211001 - 2⁷ = 121021210873 is a prime.

It is a super-2 number, since 2×121021211001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021211401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429153090 + ... + 429153371.

It is an arithmetic number, because the mean of its divisors is an integer number (20599355088).

Almost surely, 2^121021211001 is an apocalyptic number.

It is an amenable number.

121021211001 is a deficient number, since it is larger than the sum of its proper divisors (43773629703).

121021211001 is an equidigital number, since it uses as much as digits as its factorization.

121021211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858306511.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121021211001 its reverse (100112120121), we get a palindrome (221133331122).

The spelling of 121021211001 in words is "one hundred twenty-one billion, twenty-one million, two hundred eleven thousand, one".